Question #85227

a system initially containing 2.0 mol of H2O,1.0 mol of D2O and 2.0 mol of HDO is allowed to exchange hydrogen for deuterium.Determine the amount of H2O,D2O AND HDO expected at equilibrium.

Expert's answer

If you have a electronic balance then simply weighing will do.

D2O is 1/18 or 5% heavier than water. If you have 1L of water it weighs 1000g. 1% of D2O will add another 0.2 g. Most scales can measure 1mg precision.

If you want ratio of DHO then the same can also be done, you just need to solve a few simultaneous equations:

a(16)+b(17)+c(18) = weight

a+b+c = 1L

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